I picked this bike up from a friend on loan. Hadnt been rode in about a year gas was still in carb. I drained the tank and the carb doused it with carb cleaner changed the plug and put fresh gas in and tried to kick it over, it hit a couple times but never took off then I noticed I was leaking fuel out of almost all of the overflow(?) hoses. Pulled carb off and plan on cleaning it good. My question is Ive been reading about the bk mod, oring mod, fuel mixture screw jetting and ect. Far as I know the bike is stock. What do I need to do while I have the carb off. The more I read the more confused ive got. from what ive understood the oring and bk mod do the same thing just the bk has more adjustability. and far as jetting I have no idea where to begin. Any help or links are much appreciated.